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#1
10-03-2005, 02:13 PM
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rear gears
how much of a noticeable difference will i recieve from putting 3.73 gears in? also how much would my gas mileage go down? I have the same questions for the 4.10 gears. my car is a 96 3.8, auto , thanks in advance
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2004 GTO A4 Brand new LS1 crate motor with upgraded fuel system, forged internals STS turbo @5 psi (everyday) 8-10 psi for track a few other little things ... soon to go on a dyno 
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#2
10-03-2005, 02:16 PM
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The main difference will be in the RPMs, I also heard that gas mileage isnt that big difference too. 4.10 gears arent also really recommended if you do alot of highway driving.
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#3
10-03-2005, 02:17 PM
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Re: rear gears
do you know what gears you have now....i think there 2.73 and if so yes you will see a big difference....i went from 2.73's to 3.42's and i felt a good difference and my gas milage got better.....it all depends on what you drive more...city or highway...i do about both equal so for somereason i get better gas milage with my 3.42's. and since you have an auto probably wouldnt go with the 4.11's
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1991 RS 305 T.B.I. 700-R4 
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#4
10-03-2005, 02:41 PM
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Re: rear gears
i went with 3.73 didn't notice and gas milage difference but the thing takes off like a bat out of hell compared to when i had the one spinner going
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355 small block 4 bolt, 700R4 tranny/w shift kit, elbrock 650 carb, elbrock intake, mild cam, 3.73 posi rear end, 3" cowl hood, 3" exhust, b&m mega shifter, k&n air filter, ac delete 
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#5
10-03-2005, 04:05 PM
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Re: rear gears
He has an RS so it's either 3.23 or 3.42, can't remember which, but he has LSD
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97 Camaro - 2.077 60', 14.745 @ 92.20 - still down, one year later. 194k miles-160* thermo-V8 shocks/springs (V6 rear springs)-3" Magnaflow !cat (3" dynomax bullet) back-SLP CAI-stock boxed LCAs-poly tranny mount and torque arm bushing-custom HPTuners tuning-4.10s/eaton/TA girdle-3.5" alum DS-spohn LCA brackets-prostar skinnies 179.75 RWHP, 204.52 RWTQ ON ITS WAY: MORE R.I.P. Andy 87 Benz 190e - DD 01 EX250 - still gotta get my license for this thing
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#6
10-03-2005, 05:40 PM
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Re: rear gears
yeah i was thinking it was the 3.42 but i could be wrong, i spend about equal time in the city and highway
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2004 GTO A4 Brand new LS1 crate motor with upgraded fuel system, forged internals STS turbo @5 psi (everyday) 8-10 psi for track a few other little things ... soon to go on a dyno
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#7
10-03-2005, 06:06 PM
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Re: rear gears
3.73's wont be TOO much of a difference, 4.10s are always nice but you'llbe a few hundred RPM more on the highway and your gas milage may go down a tad, but a lot of people notice better citymilage with 4.10s
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97 Camaro - 2.077 60', 14.745 @ 92.20 - still down, one year later. 194k miles-160* thermo-V8 shocks/springs (V6 rear springs)-3" Magnaflow !cat (3" dynomax bullet) back-SLP CAI-stock boxed LCAs-poly tranny mount and torque arm bushing-custom HPTuners tuning-4.10s/eaton/TA girdle-3.5" alum DS-spohn LCA brackets-prostar skinnies 179.75 RWHP, 204.52 RWTQ ON ITS WAY: MORE R.I.P. Andy 87 Benz 190e - DD 01 EX250 - still gotta get my license for this thing
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#8
10-03-2005, 06:30 PM
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i would go with 3.73 if you are spending equal time on the highway as the cities... 4.10 is a little deep for an automatic in my opinion...
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 '92 RS lt1/t56, lt4 hot cam, 30lb injectors, 54mm throttle body, full exhaust, 4.11 posi, 4 coil ignition, alluminum driveshaft, adj rear suspension, low. springs, electric water pump, custom tune.
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#9
10-03-2005, 06:32 PM
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Re: rear gears
why's it better on a manual?
for example, the 5 speed v6's have a worse O/D ear than the autos (.72:1 to .70:1 or soemthing liek that) but some people still say "oh max 3.73 for auto... 4.10 for manual..."
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97 Camaro - 2.077 60', 14.745 @ 92.20 - still down, one year later. 194k miles-160* thermo-V8 shocks/springs (V6 rear springs)-3" Magnaflow !cat (3" dynomax bullet) back-SLP CAI-stock boxed LCAs-poly tranny mount and torque arm bushing-custom HPTuners tuning-4.10s/eaton/TA girdle-3.5" alum DS-spohn LCA brackets-prostar skinnies 179.75 RWHP, 204.52 RWTQ ON ITS WAY: MORE R.I.P. Andy 87 Benz 190e - DD 01 EX250 - still gotta get my license for this thing
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#10
10-03-2005, 06:42 PM
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well generally it is correct, i didnt' know v6's top gear on there auto was more shallow than top gear on the manuals... most of the time its the other way and 4.10's are usually too deep for an auto, because they're top gear is generally deeper than manuals...
just because it doesn't apply for v6's doesn't mean that it is usually a good rule of thumb
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'92 RS lt1/t56, lt4 hot cam, 30lb injectors, 54mm throttle body, full exhaust, 4.11 posi, 4 coil ignition, alluminum driveshaft, adj rear suspension, low. springs, electric water pump, custom tune.
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#11
10-03-2005, 06:44 PM
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Re: rear gears
you're all just too pussy for em
 but I cant talk till I get em... which wont be for a while due to $$...
__________________
97 Camaro - 2.077 60', 14.745 @ 92.20 - still down, one year later. 194k miles-160* thermo-V8 shocks/springs (V6 rear springs)-3" Magnaflow !cat (3" dynomax bullet) back-SLP CAI-stock boxed LCAs-poly tranny mount and torque arm bushing-custom HPTuners tuning-4.10s/eaton/TA girdle-3.5" alum DS-spohn LCA brackets-prostar skinnies 179.75 RWHP, 204.52 RWTQ ON ITS WAY: MORE R.I.P. Andy 87 Benz 190e - DD 01 EX250 - still gotta get my license for this thing
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#12
10-03-2005, 06:51 PM
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i just wouldn't want to top out at like 90mph... no matter how fast i get there i like having a high top end...
__________________
'92 RS lt1/t56, lt4 hot cam, 30lb injectors, 54mm throttle body, full exhaust, 4.11 posi, 4 coil ignition, alluminum driveshaft, adj rear suspension, low. springs, electric water pump, custom tune.
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#13
10-03-2005, 06:54 PM
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Re: rear gears
keeps you from getting more tickets :shrug: lol
__________________
97 Camaro - 2.077 60', 14.745 @ 92.20 - still down, one year later. 194k miles-160* thermo-V8 shocks/springs (V6 rear springs)-3" Magnaflow !cat (3" dynomax bullet) back-SLP CAI-stock boxed LCAs-poly tranny mount and torque arm bushing-custom HPTuners tuning-4.10s/eaton/TA girdle-3.5" alum DS-spohn LCA brackets-prostar skinnies 179.75 RWHP, 204.52 RWTQ ON ITS WAY: MORE R.I.P. Andy 87 Benz 190e - DD 01 EX250 - still gotta get my license for this thing
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#14
10-03-2005, 06:58 PM
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lol i think you meant to use this one
 screw tickets i have 7 tickets and 2 wrecks, and still drive the same way haha
__________________
'92 RS lt1/t56, lt4 hot cam, 30lb injectors, 54mm throttle body, full exhaust, 4.11 posi, 4 coil ignition, alluminum driveshaft, adj rear suspension, low. springs, electric water pump, custom tune.
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#15
10-03-2005, 07:06 PM
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Re: rear gears
haha I have... 3... no 5... no 6 tickets (2 got thrown out, 2 got reduced, 1 was 0 points tintd windows ticket) and about... 3-4 verbal warnings (speeding, loud exhaust/slight speeding, loud exhaust/no front plate) and one accident... I drive a little more carefully now...
__________________
97 Camaro - 2.077 60', 14.745 @ 92.20 - still down, one year later. 194k miles-160* thermo-V8 shocks/springs (V6 rear springs)-3" Magnaflow !cat (3" dynomax bullet) back-SLP CAI-stock boxed LCAs-poly tranny mount and torque arm bushing-custom HPTuners tuning-4.10s/eaton/TA girdle-3.5" alum DS-spohn LCA brackets-prostar skinnies 179.75 RWHP, 204.52 RWTQ ON ITS WAY: MORE R.I.P. Andy 87 Benz 190e - DD 01 EX250 - still gotta get my license for this thing
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